0
0
×
Account Login
1-800-345-4545
Gift Cards
Track Order
Help Center
PRODUCT DISCONTINUED

Speedmaster Cast Aluminum Cylinder Head Big Block Mopar 383/440 w/Hydraulic Flat Tappet Cam

746-PCE281.2140


Product Q&A
View Now
Click image to zoom
Cast Aluminum Cylinder Head Big Block Mopar 383/440 w/Hydraulic Flat Tappet Cam
Cast Aluminum Cylinder Head
  • Big Block Mopar 383/440 w/Hydraulic Flat Tappet Cam
  • Assembled Head
  • 74cc Combustion Chamber
  • 265cc Intake Runner
  • Includes Valves & Springs
  • Set of 2
  • Currently unavailable.
    This product is not available, please call customer service for options, at 1-800-345-4545.
    PCE281.2140 is rated 1.0 out of 5 by 3.
    Rated 1 out of 5 by from I have had the motor together but can’t find pushrods. First set of rockers were wrong and pushrods were wrong. Then new rockers were right wrong pushrods. Now i have measured pushrods and can’t find the right ones. Plus the valley tray I finally had to build my own as well pain in the butt
    Date published: 2023-12-05
    Rated 1 out of 5 by from Worst machine work on the market I purchased a set of these heads and had to do a lot of material removal for pushrod clearance. On top of that they require a .750 to .800 offset rocker to run a 3/8 pushrod. After that they had to be ripped down and re lap the calves cause they where not done right. After the break in and dyno tune with engine in the car a valve broke and ruined the entire engine. The heads have been sent in and welded re milled and all Manley valves on my new build. In the end these heads cost me almost 10k because of the failure and building another engine. Please do not run these with the hardware they are built with or you are really taking a gamble.
    Date published: 2020-04-12
    • y_2024, m_5, d_8, h_6
    • bvseo_bulk, prod_bvrr, vn_bulk_3.0.42
    • cp_1, bvpage1
    • co_hasreviews, tv_1, tr_2
    • loc_en_US, sid_10001_10001_3544313, prod, sort_[SortEntry(order=RATING, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
    • clientName_jegs

    will stock rocker shafts and rockers work with these heads?

    Asked by: Robd440
    The Speedmaster 746-PCE281.2140 cylinder head requires offset rockers.
    Answered by: jshook
    Date published: 2024-01-26

    What's the port size so I can pick a intake manifold to match the best I can out what would be recommended

    Asked by: Knisha
    The Speedmaster 746-PCE281.2140 cylinder head has port sizes measuring 2.23 x 1.185.
    Answered by: jshook
    Date published: 2023-03-09

    Do these require offset rocker arms

    Asked by: Craig440
    Yes, these are the recommended rocker arms - https://www.jegs.com/i/Speedmaster/746/1-261-026/10002/-1
    Answered by: Rusty B
    Date published: 2023-01-14

    Will the bear cast heads ( not cnc ) capable of making 500 to 550 hp with 10.51 compression with a 600 lift cam and a 850 carb

    Asked by: Ronalda
    Yes, with the right accessories this would be capable of making 500 hp.
    Answered by: Rusty B
    Date published: 2018-09-25

    Is it possible to get 11 to 1 compression using Wesco flat top pistons by Milling the heads

    Asked by: Ronalda
    We offer a number of pistons that will be around 11:1 without milling these heads.
    Answered by: Rusty B
    Date published: 2018-09-10

    What is the compression using flat top Wesco Pistons

    Asked by: Ronalda
    The compression when using a Wiseco flat top piston with this cylinder head will be approximately 10.2:1
    Answered by: Rusty B
    Date published: 2018-09-08

    What would the compression ratio be with flat top pistons with these heads

    Asked by: Ronalda
    We would need to know what pistons you were using.
    Answered by: Rusty B
    Date published: 2018-08-29

    What is the max horsepower these heads will make

    Asked by: Ronalda
    Many factors involved in that, these will make at least 750 hp in the right installation.
    Answered by: Rusty B
    Date published: 2018-09-05
    • y_2024, m_5, d_8, h_6CST
    • bvseo_bulk, prod_bvqa, vn_bulk_3.0.42
    • cp_1, bvpage1
    • co_hasquestionsanswers, tq_11
    • loc_en_US, sid_10001_10001_3544313, prod, sort_[SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING)]
    • clientName_jegs

    Items You Need

    Related Products

    This is an unassembled bare cylinder head with valve guides and valve seats installed only. Does not include any parts such as valves, springs, spring components, studs or guideplates. LS Chevy 260cc LS3 Mongoose Basic Package Components100% CNC Ported Combustion ...
    Close
    LS Chevy 260cc LS3 Mongoose Basic Package Components100% CNC Ported Combustion Chambers 100% CNC Ported Exhaust Ports 100% CNC Ported Intake PortsCompetition 5-Angle Valve Job 8mm Bead Lock Intake Valve, 2.165" x 5.195" Overall Valve Length 8mm Bead Lock Exhaust ...
    Close
    Includes:Fully-Assembled Cylinder HeadsIntake ValvesExhaust ValvesIntake Manifold GasketsValve SpringsDamper SpringRetainers10-Degree LocksValve Stem SealsRocker Arms, Studs, NutsGuideplatesValve Covers, GuidesAssembly Specs:Maximum Lift: .580 in.Coil Bind: .750 in.Intake Install: 145 lbs @ 1.9Exhaust Install: 145 ...
    Close

    Recently Viewed

    Some parts are not legal for use in California or other states with similar laws / regulations

    Motor Vehicles

    WARNING: Motor vehicles contain fuel, oils and fluids, battery posts, terminals and related accessories which contain lead and lead compounds and other chemicals known to the State of California to cause cancer, birth defects and other reproductive harm. These chemicals are found in vehicles, vehicle parts and accessories, both new and as replacements. When being serviced, these vehicles generate used oil, waste fluids, grease, fumes and particulates, all known to the State of California to cause cancer, birth defects, and reproductive harm.

    Tools:

    WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Some examples of these chemicals are: lead from lead-based paints, crystalline silica from bricks and cement and other masonry products, and arsenic and chromium from chemically treated lumber. Your risk from exposure to these chemicals varies, depending on how often you do this type of work. To reduce your exposure, work in a well-ventilated area and with approved safety equipment, such as dust masks that are specially designed to filter out microscopic particles.

    Electrical Cords

    WARNING: The wires of these products contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.